Browse all practice questions for the California Registered Environmental Health Specialist (REHS) Disaster Management Practice Test. Search by topic, open any question and review its full explanation, then test yourself in the practice quiz.

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  • How are water system operations and sampling coordinated after a contamination event?
  • In pet and people combined sheltering, which process is essential for reuniting separated pets with owners?
  • Which of the following is a disadvantage of mass burials?
  • The unit pCi/L is used to measure which quantity in the context of radon?
  • If the water is clear, how much bleach should be added to 5 gallons of water to disinfect it?
  • Delivered water must have what free chlorine residual?
  • Describe the process for coordinating food recalls during a disaster.
  • Which statement best describes the components addressed by a COOP for environmental health services?
  • How many emergency functions exist under CalOES?
  • What is the purpose of CHEMTREC?
  • How many SEMS levels exist?
  • Radon concentration is typically reported in which unit?
  • Inhalation of radon alpha particles increases the risk of which health effect?
  • When a retail food facility is under a boil water order, what is the first action to take?
  • Rad measures energy deposited or absorbed in what?
  • The Operational Planning Worksheet (ICS-215) is used primarily for what purpose?
  • In California, which statutory framework authorizes local disaster declarations and sets powers for public health emergencies?
  • What does picocuries measure?
  • What does SCC stand for in SEMS?
  • Which roles comprise the ICS Command Staff?
  • Teratogenic effects are most closely associated with which outcome?
  • How far from the surface should burial stop when burying private garbage?
  • Which action is required immediately when a boil water order is issued for a retail facility?
  • Which factor should be posted with buried human waste?
  • Why is it important to maintain disinfection residuals in the water supply after a disaster?
  • What is the general sequence for hazardous materials decontamination in a disaster setting?
  • Which material can stop a beta particle?
  • What does NIMS stand for?
  • Which of the following is an option for removal of dead animal carcasses?
  • What sanitizing solution concentration is recommended for a mass feeding center (chlorine bleach per gallon of water)?
  • The rem is used to compare radiation types on the same scale.
  • For state reimbursement, which management system must an EOC utilize?
  • Which of the following is NOT a form of ionizing radiation?
  • Per SEMS, are emergencies managed at the highest or lowest level?
  • What is mutual aid, and why is resource typing important in disaster management?
  • Which of the following factors influence evacuation decision-making in a disaster?
  • How deep and wide should a burial hole for private garbage be?
  • Which description correctly outlines PPE Level A through Level D and their typical field uses in disaster response?
  • What is the first priority in solid waste disposal during a disaster?
  • Syndromic surveillance data is used to guide interventions by detecting outbreaks based on?
  • Which burial procedure for human waste is recommended?
  • How many inches of soil should be placed over private garbage per day?
  • What is the primary purpose of the Incident Command System (ICS) in disaster response, and which are its core organizational components?
  • What are the first two priorities for mass care and shelter?
  • In a radiation incident, the hot zone corresponds to exposure level of approximately how many mR/hr?
  • What is a staging area?
  • In the field decontamination sequence for chemical exposure, why is removing clothing first?
  • Somatic effects refer to damage to which type of cells?
  • When assessing the status of the drinking water supply, which of the following should you check?
  • If there is low water pressure after an emergency, what is the concern?
  • What daily covering practice is recommended for mass garbage trenches?
  • Which indicators are used to assess a potential hazardous materials release?
  • The rem is used to compare biological effects of different radiations on humans.
  • In incident management, which role is primarily responsible for safety during operations?
  • What type of particles are emitted by radon?
  • Which ICS forms are commonly used for resource management and planning?
  • In a hazardous materials decontamination process, what is the purpose of the warm zone?
  • Under ICS, what is considered a manageable span of control?
  • In a hazardous materials or decontamination area, which statement correctly defines hot, warm, and cold zones?
  • Which description best captures risk communication in disaster management?
  • How much water is ideal to provide per person per day in emergency planning?
  • What is the recommended contact time for chlorine in a well-disinfection procedure before flushing?
  • Which two tasks are identified as the first priorities for mass care and shelter?
  • Which SEMS level involves local agencies coordinating through an Emergency Operations Center (EOC)?
  • Resource typing in disaster management serves what main purpose?
  • In a radiation incident, how many mR/hour should the staging area be exposed?
  • What triggers a boil-water advisory, and what steps should be taken in response?
  • What is the advantage of a Geiger counter?
  • During a water outage, which action is explicitly required to protect food safety?
  • In hazardous materials operations, which zone is the clean area?
  • What is the purpose of having four sinks in a mass feeding center?
  • What is a core element of integrated planning for pet sheltering or co-sheltering in disasters?
  • In incident management, Unified Command is used under which condition?
  • Teratogenic effects are associated with what outcome?
  • What does EMAC stand for?
  • During well disinfection, why should you open the farthest tap until a chlorine odor is detected?
  • Which practice is recommended for safety when using emergency power at shelters?
  • What is the most important aspect of solid waste management after a disaster?
  • Which unit is used to express radiation exposure in the given guidelines?
  • Which particles are hazardous without ingesting/inhaling?
  • How many people can one pit toilet serve?
  • ICS stands for what does ICS stand for?
  • What is a disadvantage of a Geiger counter?
  • What are Medical Countermeasures (MCM) stockpiles and their role in disasters?
  • Which of the following is listed as a disadvantage of fixed facility incineration?
  • What is the role of the Emergency Operations Center (EOC) during a disaster?
  • Which parameter should be monitored in the distribution system during a water emergency?
  • During a disaster, which entity is responsible for locating and deploying resources to the State Coordination Center (SCC) from non-impacted areas?
  • Which components are typically included in a COOP for environmental health?
  • How long should water be boiled to disinfect it?
  • What are best practices for managing volunteers in a disaster response?
  • If water service is interrupted to a retail food establishment, which of the following actions is required to protect safety?
  • Which ICS function is responsible for directing incident objectives and priorities?
  • What is syndromic surveillance and how is it used in disaster response?
  • Which statement is listed about fixed facility incineration?
  • In an emergency, pit privies should be at least how many feet from lakes, streams, and wells?
  • Unity of command means which of the following?
  • Define shelter-in-place and provide a scenario when it is preferred over evacuation.
  • What depth is recommended for burying infectious waste?
  • What is the ALARA principle in radiation safety?
  • SEMS is designed to improve five emergency response elements. Which of the following lists those five elements?
  • Which of the following correctly lists the five ICS functions?
  • How long should emergency-disinfected water be stored?
  • Medical Countermeasures (MCM) stockpiles are typically managed by which entity?
  • Which statement best distinguishes sanitation, disinfection, and sterilization in environmental health practice?
  • What is the most useful way to measure radiation exposure?
  • Which type of ionizing radiation can be deconned?
  • Which statement about the ICS-214 Unit Log is true?
  • How should a credible exercise be designed to test disaster management capabilities?
  • What is backflow in sewer systems, and why is it a hazard after floods?
  • During a disaster, the State Operations Center (SOC) is responsible for which of the following?
  • Which option is NOT a recommended practice for emergency power generation safety?
  • Which actions are key to safe shelter sanitation during mass care operations?
  • How deep should human waste be buried at minimum?
  • How long can garbage be stored on-site during an emergency if properly sealed?
  • What can stop gamma rays?
  • In disaster response planning, which item is listed as the first priority for protecting food safety?
  • What should be included in an After-Action Report (AAR) and Improvement Plan (IP)?
  • How should disaster waste management handle household hazardous waste after a disaster?
  • Which of the following is NOT listed as a basic emergency function?
  • How does a Geiger counter work?
  • What constitutes a Multi-Casualty Incident (MCI) and how does it affect local response?
  • Which statement correctly describes ionization chamber measurement?
  • Which of the following best describes the purpose of a COOP for environmental health services?
  • Distinguish between Command Staff and General Staff in ICS.
  • Which statement correctly describes the relationship between distance and radiation exposure according to the inverse square law?
  • Which factors help reduce exposure to gamma radiation?
  • How much iodine is needed to disinfect 5 gallons of water?
  • Which of the following describes Air Curtain Incineration?
  • Which penetrates further, X-rays or gamma rays?
  • What is the recommended maximum radon exposure in a home?
  • During a disaster, what happens when an incident overwhelms local response capabilities?
  • Which statement best describes the role of the Public Information Officer during an incident?
  • What must be done after the two-week storage period for garbage stored on-site?
  • What type of container should be used to store emergency-disinfected water?
  • Which functions are included in the ICS General Staff?
  • In pet and people sheltering plans, what is a common requirement to minimize conflicts between spaces?
  • What are essential components of shelter infection prevention and control?
  • The specified trench size is designed to handle approximately how many people per day?
  • Which ICS group is responsible for developing the tactical action plan and the incident action plan?
  • Which factor influences the type of pit toilets constructed during an emergency?
  • A COOP aims to preserve essential functions during emergencies. Which is NOT a typical feature?
  • If burying mass garbage onsite, what are the trench dimensions?
  • During a disaster, which statement best describes the responsibilities of the state Office of Emergency Services (OES)?
  • How many steps are listed for implementing a boil water order after service resumes?
  • If trucks are used to haul water, how must they be cleaned prior to use?
  • Which steps are involved in vector control following floods or periods of standing water?
  • Which of the following can stop a beta particle?
  • Which ICS group procures equipment, food, transportation, and communications?
  • Which meter is better for high levels of radiation - Geiger or Ionization?
  • Which ICS function oversees cost accounting and reimbursement documentation?
  • What chlorine concentration (ppm) is required to disinfect food contact surfaces and toys at emergency shelters?
  • Which of the following best describes essential sanitation facility considerations in shelter operations?
  • What chlorine concentration (ppm) is required to disinfect floors, counters, sinks, and toilets at emergency shelters?
  • Which SEMS level in California includes six mutual aid regions?
  • Which ICS function is primarily responsible for information sharing and incident status?
  • What best describes Air Curtain Incineration?
  • Which type of radiation is most dangerous if ingested/inhaled?
  • Which roles report directly to the Incident Commander?
  • In SEMS, which term stands for the coordinating role at the Medical Health Operational Area?
  • Which items are required to be contained in the medical log book at an emergency shelter?
  • At the Operational Level of SEMS, which role coordinates medical health operations?
  • Which ratio correctly states the required number of restrooms for an emergency shelter relative to residents?
  • Are alpha or beta particles smaller?
  • Rad is primarily a measure of what?
  • Which option is NOT a key element of a debris management plan?
  • How far can beta particles travel in the air?
  • Which option correctly defines ionizing radiation interacting with matter?
  • Genetic effects refer to biological effects on which group?
  • Which activity is NOT typically part of the environmental health role in disaster recovery?
  • Which ICS function is established first after command?
  • How should the integrity of a water distribution system be verified during recovery?
  • Which outcome is achieved by integrated planning for pet sheltering or co-sheltering?
  • Which considerations are involved in providing safe food in disaster shelters?
  • In a mass feeding center, how many sinks are recommended and what are their functions?
  • What is the recommended span of control for supervisors in ICS?
  • What is the typical sequence for decontaminating a patient exposed to chemical agents in the field?
  • What will protect you from gamma rays?
  • ALARA stands for what phrase?
  • What is an ionization chamber?
  • What shelter space per person is recommended for housing during an emergency?
  • How deep should private garbage be buried?
  • Which federal agency makes recommendations for radon exposure in homes?
  • How should water quality be managed after a disaster event?
  • Do bacteria and viruses survive incineration?
  • If there are more than how many evacuees, a full-time environmental health specialist (EHS) must monitor the shelter?
  • What is a key practice for segregation of hazardous and nonhazardous waste in disaster settings?
  • Which describes a possible cellular outcome after radiation exposure?
  • What mold remediation practices are recommended after water intrusion in buildings?
  • In shelter operations, why are separate facilities for families with infants important?
  • Which practice is recommended to prevent disease spread through shelter sanitation?
  • In a disaster, which resource is the top operational priority?
  • Environmental health is supported under which Emergency Support Functions (ESFs)?
  • Which particles only cause damage when ingested?
  • Roentgen measures what?
  • X-rays vs gamma rays: which penetrates farther?
  • If the water is cloudy, how much bleach should be added to 5 gallons of water to disinfect it?
  • At what point should you stop using a buried mass garbage trench?
  • A rem stands for which term?
  • Why is animal sheltering important in disaster management, and what considerations apply to pets?
  • What is ionizing radiation?
  • For radiation exposure, if distance is doubled, exposure is reduced by what factor?
  • In the ICS system, which set of roles comprises the command staff?
  • Which statement best defines risk communication in disaster management?
  • How can you protect yourself from gamma radiation?
  • Which condition allows salvage of a container after a fire or flood?
  • During disaster recovery, environmental health personnel should do which of the following?
  • What are cultural and language considerations in disaster risk communication?
  • Which option best describes the complete process to disinfect a well using chlorine?
  • In a disaster, when coordinating food recalls, which group should be notified first?
  • In ICS, which role is typically NOT part of the Command Staff?
  • What is California's incident management system called?
  • Which factor is explicitly listed as affecting vector/pest management during a disaster?
  • What is the primary reason for installing backflow preventers in buildings in flood-prone areas?
  • Which statement accurately differentiates a drill from a tabletop exercise?
  • SEMS stands for which phrase?
  • Which ICS function is responsible for obtaining and moving resources to the incident?
  • What is the required bed spacing distance in an emergency shelter?
  • Which practice reduces exposure to gamma radiation?
  • When asbestos-containing materials are damaged during a disaster, who should conduct abatement and what precautions should be followed?
  • In environmental health disasters, when is asbestos risk a concern and what actions should be taken?
  • What distance from a water source is recommended when burying mass garbage onsite?
  • Somatic effects may take what to become evident?
  • Which of the following is an advantage of open air burning?
  • Which two sources of water in a home could be used, though not necessarily for drinking?
  • What 4 things could happen when radiation hits a cell?
  • Who can request a Presidential declaration of emergency or major disaster?
  • Lead exposure risk in housing after a disaster, and how should it be mitigated?
  • What makes NIMS valuable?
  • What can stop an alpha particle?
  • How much household bleach is needed to disinfect 1,000 gallons of clear water?
  • What is the percentage of chlorine residual in typical household bleach?
  • List three critical food-safety considerations for disaster feeding operations.
  • Which SEMS level encompasses multiple jurisdictions and mutual aid and includes the involvement of MHOAC?
  • Which expression correctly represents the general formula for calculating the amount of chlorine bleach needed to achieve a desired ppm, given the percent chlorine in the product?
  • Can food be salvaged after a fire or flood? If salvage is allowed, what condition applies and what procedure is used?
  • In ICS, which group is responsible for Operations, Planning, Logistics, and Finance/Administration?
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